src/compositor-wayland.c

   1 /*
   2  * Copyright © 2010-2011 Benjamin Franzke
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and
   5  * its documentation for any purpose is hereby granted without fee, provided
   6  * that the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of the copyright holders not be used in
   9  * advertising or publicity pertaining to distribution of the software
  10  * without specific, written prior permission.  The copyright holders make
  11  * no representations about the suitability of this software for any
  12  * purpose.  It is provided "as is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  15  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  16  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  17  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  18  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  19  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  20  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stddef.h>
  28 #define _GNU_SOURCE
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <fcntl.h>
  33 #include <unistd.h>
  34
  35 #include <wayland-client.h>
  36 #include <wayland-egl.h>
  37
  38 #include <GLES2/gl2.h>
  39 #include <GLES2/gl2ext.h>
  40 #include <EGL/egl.h>
  41 #include <EGL/eglext.h>
  42
  43 #include "compositor.h"
  44
  45 struct wayland_compositor {
  46         struct weston_compositor         base;
  47
  48         struct {
  49                 struct wl_display *display;
  50                 struct wl_compositor *compositor;
  51                 struct wl_shell *shell;
  52                 struct wl_output *output;
  53
  54                 struct {
  55                         int32_t x, y, width, height;
  56                 } screen_allocation;
  57
  58                 struct wl_event_source *wl_source;
  59                 uint32_t event_mask;
  60         } parent;
  61
  62         struct wl_list input_list;
  63 };
  64
  65 struct wayland_output {
  66         struct weston_output    base;
  67
  68         struct {
  69                 struct wl_surface       *surface;
  70                 struct wl_shell_surface *shell_surface;
  71                 struct wl_egl_window    *egl_window;
  72         } parent;
  73         EGLSurface egl_surface;
  74         struct weston_mode      mode;
  75 };
  76
  77 struct wayland_input {
  78         struct wayland_compositor *compositor;
  79         struct wl_input_device *input_device;
  80         struct wl_list link;
  81 };
  82
  83 static int
  84 wayland_input_create(struct wayland_compositor *c)
  85 {
  86         struct weston_input_device *input;
  87
  88         input = malloc(sizeof *input);
  89         if (input == NULL)
  90                 return -1;
  91
  92         memset(input, 0, sizeof *input);
  93         weston_input_device_init(input, &c->base);
  94
  95         c->base.input_device = &input->input_device;
  96
  97         return 0;
  98 }
  99
 100 static int
 101 wayland_compositor_init_egl(struct wayland_compositor *c)
 102 {
 103         EGLint major, minor;
 104         EGLint n;
 105         const char *extensions;
 106         EGLint config_attribs[] = {
 107                 EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
 108                 EGL_RED_SIZE, 1,
 109                 EGL_GREEN_SIZE, 1,
 110                 EGL_BLUE_SIZE, 1,
 111                 EGL_ALPHA_SIZE, 0,
 112                 EGL_DEPTH_SIZE, 1,
 113                 EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
 114                 EGL_NONE
 115         };
 116         static const EGLint context_attribs[] = {
 117                 EGL_CONTEXT_CLIENT_VERSION, 2,
 118                 EGL_NONE
 119         };
 120
 121         c->base.display = eglGetDisplay(c->parent.display);
 122         if (c->base.display == NULL) {
 123                 fprintf(stderr, "failed to create display\n");
 124                 return -1;
 125         }
 126
 127         if (!eglInitialize(c->base.display, &major, &minor)) {
 128                 fprintf(stderr, "failed to initialize display\n");
 129                 return -1;
 130         }
 131
 132         extensions = eglQueryString(c->base.display, EGL_EXTENSIONS);
 133         if (!strstr(extensions, "EGL_KHR_surfaceless_gles2")) {
 134                 fprintf(stderr, "EGL_KHR_surfaceless_gles2 not available\n");
 135                 return -1;
 136         }
 137
 138         if (!eglBindAPI(EGL_OPENGL_ES_API)) {
 139                 fprintf(stderr, "failed to bind EGL_OPENGL_ES_API\n");
 140                 return -1;
 141         }
 142         if (!eglChooseConfig(c->base.display, config_attribs,
 143                              &c->base.config, 1, &n) || n == 0) {
 144                 fprintf(stderr, "failed to choose config: %d\n", n);
 145                 return -1;
 146         }
 147
 148         c->base.context = eglCreateContext(c->base.display, c->base.config,
 149                                            EGL_NO_CONTEXT, context_attribs);
 150         if (c->base.context == NULL) {
 151                 fprintf(stderr, "failed to create context\n");
 152                 return -1;
 153         }
 154
 155         if (!eglMakeCurrent(c->base.display, EGL_NO_SURFACE,
 156                             EGL_NO_SURFACE, c->base.context)) {
 157                 fprintf(stderr, "failed to make context current\n");
 158                 return -1;
 159         }
 160
 161         return 0;
 162 }
 163
 164 static int
 165 wayland_output_prepare_render(struct weston_output *output_base)
 166 {
 167         struct wayland_output *output = (struct wayland_output *) output_base;
 168         struct weston_compositor *ec = output->base.compositor;
 169
 170         if (!eglMakeCurrent(ec->display, output->egl_surface,
 171                             output->egl_surface, ec->context)) {
 172                 fprintf(stderr, "failed to make current\n");
 173                 return -1;
 174         }
 175
 176         return 0;
 177 }
 178
 179 static void
 180 frame_done(void *data, struct wl_callback *wl_callback, uint32_t time)
 181 {
 182         struct weston_output *output = data;
 183
 184         weston_output_finish_frame(output, time);
 185 }
 186
 187 static const struct wl_callback_listener frame_listener = {
 188         frame_done
 189 };
 190
 191 static int
 192 wayland_output_present(struct weston_output *output_base)
 193 {
 194         struct wayland_output *output = (struct wayland_output *) output_base;
 195         struct wayland_compositor *c =
 196                 (struct wayland_compositor *) output->base.compositor;
 197         struct wl_callback *callback;
 198
 199         if (wayland_output_prepare_render(&output->base))
 200                 return -1;
 201
 202         eglSwapBuffers(c->base.display, output->egl_surface);
 203         callback = wl_surface_frame(output->parent.surface);
 204         wl_callback_add_listener(callback, &frame_listener, output);
 205
 206         return 0;
 207 }
 208
 209 static int
 210 wayland_output_prepare_scanout_surface(struct weston_output *output_base,
 211                                        struct weston_surface *es)
 212 {
 213         return -1;
 214 }
 215
 216 static int
 217 wayland_output_set_cursor(struct weston_output *output_base,
 218                           struct weston_input_device *input)
 219 {
 220         return -1;
 221 }
 222
 223 static void
 224 wayland_output_destroy(struct weston_output *output_base)
 225 {
 226         struct wayland_output *output = (struct wayland_output *) output_base;
 227         struct weston_compositor *ec = output->base.compositor;
 228
 229         eglDestroySurface(ec->display, output->egl_surface);
 230         wl_egl_window_destroy(output->parent.egl_window);
 231         free(output);
 232
 233         return;
 234 }
 235
 236 static int
 237 wayland_compositor_create_output(struct wayland_compositor *c,
 238                                  int width, int height)
 239 {
 240         struct wayland_output *output;
 241
 242         output = malloc(sizeof *output);
 243         if (output == NULL)
 244                 return -1;
 245         memset(output, 0, sizeof *output);
 246
 247         output->mode.flags =
 248                 WL_OUTPUT_MODE_CURRENT | WL_OUTPUT_MODE_PREFERRED;
 249         output->mode.width = width;
 250         output->mode.height = height;
 251         output->mode.refresh = 60;
 252         wl_list_init(&output->base.mode_list);
 253         wl_list_insert(&output->base.mode_list, &output->mode.link);
 254
 255         output->base.current = &output->mode;
 256         weston_output_init(&output->base, &c->base, 0, 0, width, height,
 257                          WL_OUTPUT_FLIPPED);
 258
 259         output->parent.surface =
 260                 wl_compositor_create_surface(c->parent.compositor);
 261         wl_surface_set_user_data(output->parent.surface, output);
 262
 263         output->parent.egl_window =
 264                 wl_egl_window_create(output->parent.surface, width, height);
 265         if (!output->parent.egl_window) {
 266                 fprintf(stderr, "failure to create wl_egl_window\n");
 267                 goto cleanup_output;
 268         }
 269
 270         output->egl_surface =
 271                 eglCreateWindowSurface(c->base.display, c->base.config,
 272                                        output->parent.egl_window, NULL);
 273         if (!output->egl_surface) {
 274                 fprintf(stderr, "failed to create window surface\n");
 275                 goto cleanup_window;
 276         }
 277
 278         if (!eglMakeCurrent(c->base.display, output->egl_surface,
 279                             output->egl_surface, c->base.context)) {
 280                 fprintf(stderr, "failed to make surface current\n");
 281                 goto cleanup_surface;
 282                 return -1;
 283         }
 284
 285         output->parent.shell_surface =
 286                 wl_shell_get_shell_surface(c->parent.shell,
 287                                            output->parent.surface);
 288         /* FIXME: add shell_surface listener for resizing */
 289         wl_shell_surface_set_toplevel(output->parent.shell_surface);
 290
 291         glClearColor(0, 0, 0, 0.5);
 292
 293         output->base.prepare_render = wayland_output_prepare_render;
 294         output->base.present = wayland_output_present;
 295         output->base.prepare_scanout_surface =
 296                 wayland_output_prepare_scanout_surface;
 297         output->base.set_hardware_cursor = wayland_output_set_cursor;
 298         output->base.destroy = wayland_output_destroy;
 299
 300         wl_list_insert(c->base.output_list.prev, &output->base.link);
 301
 302         return 0;
 303
 304 cleanup_surface:
 305         eglDestroySurface(c->base.display, output->egl_surface);
 306 cleanup_window:
 307         wl_egl_window_destroy(output->parent.egl_window);
 308 cleanup_output:
 309         /* FIXME: cleanup weston_output */
 310         free(output);
 311
 312         return -1;
 313 }
 314
 315 /* Events received from the wayland-server this compositor is client of: */
 316
 317 /* parent output interface */
 318 static void
 319 display_handle_geometry(void *data,
 320                         struct wl_output *wl_output,
 321                         int x,
 322                         int y,
 323                         int physical_width,
 324                         int physical_height,
 325                         int subpixel,
 326                         const char *make,
 327                         const char *model)
 328 {
 329         struct wayland_compositor *c = data;
 330
 331         c->parent.screen_allocation.x = x;
 332         c->parent.screen_allocation.y = y;
 333 }
 334
 335 static void
 336 display_handle_mode(void *data,
 337                     struct wl_output *wl_output,
 338                     uint32_t flags,
 339                     int width,
 340                     int height,
 341                     int refresh)
 342 {
 343         struct wayland_compositor *c = data;
 344
 345         c->parent.screen_allocation.width = width;
 346         c->parent.screen_allocation.height = height;
 347 }
 348
 349 static const struct wl_output_listener output_listener = {
 350         display_handle_geometry,
 351         display_handle_mode
 352 };
 353
 354 /* parent input interface */
 355 static void
 356 input_handle_motion(void *data, struct wl_input_device *input_device,
 357                      uint32_t time,
 358                      int32_t x, int32_t y, int32_t sx, int32_t sy)
 359 {
 360         struct wayland_input *input = data;
 361         struct wayland_compositor *c = input->compositor;
 362
 363         notify_motion(c->base.input_device, time, sx, sy);
 364 }
 365
 366 static void
 367 input_handle_button(void *data,
 368                      struct wl_input_device *input_device,
 369                      uint32_t time, uint32_t button, uint32_t state)
 370 {
 371         struct wayland_input *input = data;
 372         struct wayland_compositor *c = input->compositor;
 373
 374         notify_button(c->base.input_device, time, button, state);
 375 }
 376
 377 static void
 378 input_handle_key(void *data, struct wl_input_device *input_device,
 379                   uint32_t time, uint32_t key, uint32_t state)
 380 {
 381         struct wayland_input *input = data;
 382         struct wayland_compositor *c = input->compositor;
 383
 384         notify_key(c->base.input_device, time, key, state);
 385 }
 386
 387 static void
 388 input_handle_pointer_focus(void *data,
 389                             struct wl_input_device *input_device,
 390                             uint32_t time, struct wl_surface *surface,
 391                             int32_t x, int32_t y, int32_t sx, int32_t sy)
 392 {
 393         struct wayland_input *input = data;
 394         struct wayland_output *output;
 395         struct wayland_compositor *c = input->compositor;
 396
 397         if (surface) {
 398                 output = wl_surface_get_user_data(surface);
 399                 notify_pointer_focus(c->base.input_device,
 400                                      time, &output->base, sx, sy);
 401         } else {
 402                 notify_pointer_focus(c->base.input_device, time, NULL, 0, 0);
 403         }
 404 }
 405
 406 static void
 407 input_handle_keyboard_focus(void *data,
 408                              struct wl_input_device *input_device,
 409                              uint32_t time,
 410                              struct wl_surface *surface,
 411                              struct wl_array *keys)
 412 {
 413         struct wayland_input *input = data;
 414         struct wayland_compositor *c = input->compositor;
 415         struct wayland_output *output;
 416
 417         if (surface) {
 418                 output = wl_surface_get_user_data(surface);
 419                 notify_keyboard_focus(c->base.input_device,
 420                                       time, &output->base, keys);
 421         } else {
 422                 notify_keyboard_focus(c->base.input_device, time, NULL, NULL);
 423         }
 424 }
 425
 426 static const struct wl_input_device_listener input_device_listener = {
 427         input_handle_motion,
 428         input_handle_button,
 429         input_handle_key,
 430         input_handle_pointer_focus,
 431         input_handle_keyboard_focus,
 432 };
 433
 434 static void
 435 display_add_input(struct wayland_compositor *c, uint32_t id)
 436 {
 437         struct wayland_input *input;
 438
 439         input = malloc(sizeof *input);
 440         if (input == NULL)
 441                 return;
 442
 443         memset(input, 0, sizeof *input);
 444
 445         input->compositor = c;
 446         input->input_device = wl_display_bind(c->parent.display,
 447                                               id, &wl_input_device_interface);
 448         wl_list_insert(c->input_list.prev, &input->link);
 449
 450         wl_input_device_add_listener(input->input_device,
 451                                      &input_device_listener, input);
 452         wl_input_device_set_user_data(input->input_device, input);
 453 }
 454
 455 static void
 456 display_handle_global(struct wl_display *display, uint32_t id,
 457                       const char *interface, uint32_t version, void *data)
 458 {
 459         struct wayland_compositor *c = data;
 460
 461         if (strcmp(interface, "wl_compositor") == 0) {
 462                 c->parent.compositor =
 463                         wl_display_bind(display, id, &wl_compositor_interface);
 464         } else if (strcmp(interface, "wl_output") == 0) {
 465                 c->parent.output =
 466                         wl_display_bind(display, id, &wl_output_interface);
 467                 wl_output_add_listener(c->parent.output, &output_listener, c);
 468         } else if (strcmp(interface, "wl_input_device") == 0) {
 469                 display_add_input(c, id);
 470         } else if (strcmp(interface, "wl_shell") == 0) {
 471                 c->parent.shell =
 472                         wl_display_bind(display, id, &wl_shell_interface);
 473         }
 474 }
 475
 476 static int
 477 update_event_mask(uint32_t mask, void *data)
 478 {
 479         struct wayland_compositor *c = data;
 480
 481         c->parent.event_mask = mask;
 482         if (c->parent.wl_source)
 483                 wl_event_source_fd_update(c->parent.wl_source, mask);
 484
 485         return 0;
 486 }
 487
 488 static int
 489 wayland_compositor_handle_event(int fd, uint32_t mask, void *data)
 490 {
 491         struct wayland_compositor *c = data;
 492
 493         if (mask & WL_EVENT_READABLE)
 494                 wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 495         if (mask & WL_EVENT_WRITABLE)
 496                 wl_display_iterate(c->parent.display, WL_DISPLAY_WRITABLE);
 497
 498         return 1;
 499 }
 500
 501 static void
 502 wayland_destroy(struct weston_compositor *ec)
 503 {
 504         weston_compositor_shutdown(ec);
 505
 506         free(ec);
 507 }
 508
 509 static struct weston_compositor *
 510 wayland_compositor_create(struct wl_display *display, int width, int height)
 511 {
 512         struct wayland_compositor *c;
 513         struct wl_event_loop *loop;
 514         int fd;
 515
 516         c = malloc(sizeof *c);
 517         if (c == NULL)
 518                 return NULL;
 519
 520         memset(c, 0, sizeof *c);
 521
 522         c->parent.display = wl_display_connect(NULL);
 523
 524         if (c->parent.display == NULL) {
 525                 fprintf(stderr, "failed to create display: %m\n");
 526                 return NULL;
 527         }
 528
 529         wl_list_init(&c->input_list);
 530         wl_display_add_global_listener(c->parent.display,
 531                                 display_handle_global, c);
 532
 533         wl_display_iterate(c->parent.display, WL_DISPLAY_READABLE);
 534
 535         c->base.wl_display = display;
 536         if (wayland_compositor_init_egl(c) < 0)
 537                 return NULL;
 538
 539         c->base.destroy = wayland_destroy;
 540
 541         /* Can't init base class until we have a current egl context */
 542         if (weston_compositor_init(&c->base, display) < 0)
 543                 return NULL;
 544
 545         if (wayland_compositor_create_output(c, width, height) < 0)
 546                 return NULL;
 547
 548         if (wayland_input_create(c) < 0)
 549                 return NULL;
 550
 551         loop = wl_display_get_event_loop(c->base.wl_display);
 552
 553         fd = wl_display_get_fd(c->parent.display, update_event_mask, c);
 554         c->parent.wl_source =
 555                 wl_event_loop_add_fd(loop, fd, c->parent.event_mask,
 556                                      wayland_compositor_handle_event, c);
 557         if (c->parent.wl_source == NULL)
 558                 return NULL;
 559
 560         return &c->base;
 561 }
 562
 563 struct weston_compositor *
 564 backend_init(struct wl_display *display, char *options);
 565
 566 WL_EXPORT struct weston_compositor *
 567 backend_init(struct wl_display *display, char *options)
 568 {
 569         int width = 1024, height = 640, i;
 570         char *p, *value;
 571
 572         static char * const tokens[] = { "width", "height", NULL };
 573
 574         p = options;
 575         while (i = getsubopt(&p, tokens, &value), i != -1) {
 576                 switch (i) {
 577                 case 0:
 578                         width = strtol(value, NULL, 0);
 579                         break;
 580                 case 1:
 581                         height = strtol(value, NULL, 0);
 582                         break;
 583                 }
 584         }
 585
 586         return wayland_compositor_create(display, width, height);
 587 }